1887

Abstract

Summary

better understanding of wave fields that propagate in the near-surface and true underground medium, help to study the complex mountainous prestack migration imaging method. However, topography poses a problem for finite difference method. The present studies of the free-surface condition are concerned with the more general isotropic cases. This paper extends the image method from the existing elastic/viscoelastic isotropic media model to anisotropic medium model. This new method is simple to implement in conventional staggered finite difference schemes, is computationally efficient and enables modeling of highly irregular topography.

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/content/papers/10.3997/2214-4609.20140875
2014-06-16
2024-03-28
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References

  1. Hestholm, S.O. and Ruud, B.O.
    [1994] 2d finite difference elastic wave modeling including surface topography. Geophys. Prosp., 42, 371–390.
    [Google Scholar]
  2. Jih, R.S., McLaughlin, K.L. and Der, Z.A.
    [1988] Free-boundary conditions of arbitrary polygonal topography in a two-dimensional explicit elastic finite-difference scheme. Geophysics, 53, 1045–1055.
    [Google Scholar]
  3. Levander, A.R.
    [1988] Fourth-order finite-difference P-SV seismograms. Geophysics, 53, 1425–1436.
    [Google Scholar]
  4. Mittet, R.
    [2002] Free-surface boundary conditions for elastic staggered-grid modeling schemes. Geophysics, 67, 1616–1623.
    [Google Scholar]
  5. Ohminato, T. and Chouet, B.A.
    [1997] A free-surface boundary condition for including 3D topography in the finite difference method. Bull. Seism. Soc. Am., 87, 494–515.
    [Google Scholar]
  6. Robertsson, J.O.A.
    [1996] A numerical free-surface condition for elastic/viscoelastic finite-difference modeling in the presence of topography. Geophysics, 61, 1921–1934.
    [Google Scholar]
  7. Wang, X.M. and ZhangH.L.
    [2004] Modeling of elastic wave propagation on a curved free surface using an improved finite-difference algorithm. Science in China, Ser.G., 47, 633–648.
    [Google Scholar]
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